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1353 results about "Hydrogenation process" patented technology

Hydrogenation is a chemical process in which hydrogen gas is bubbled through a liquid oil in the presence of a catalyst, often a reactive metal such as platinum or nickel.

Catalytic multi-stage process for hydroconversion and refining hydrocarbon feeds

A multi-stage catalytic hydrogenation and hydroconversion process for heavy hydrocarbon feed materials such as coal, heavy petroleum fractions, and plastic waste materials. In the process, the feedstock is reacted in a first-stage, back-mixed catalytic reactor with a highly dispersed iron-based catalyst having a powder, gel or liquid form. The reactor effluent is pressure-reduced, vapors and light distillate fractions are removed overhead, and the heavier liquid fraction is fed to a second stage back-mixed catalytic reactor. The first and second stage catalytic reactors are operated at F. temperature, 1000-3500 psig hydrogen partial pressure and 20-80 lb./hr per ft.sup.3 reactor space velocity. The vapor and light distillates liquid fractions removed from both the first and second stage reactor effluent streams are combined and passed to an in-line, fixed-bed catalytic hydrotreater for heteroatom removal and for producing high quality naphtha and mid-distillate or a full-range distillate product. The remaining separator bottoms liquid fractions are distilled at successive atmospheric and vacuum pressures, low and intermediate-boiling hydrocarbon liquid products are withdrawn, and heavier distillate fractions are recycled and further upgraded to provide additional low-boiling hydrocarbon liquid products. This catalytic multistage hydrogenation process provides improved flexibility for hydroprocessing the various carbonaceous feedstocks and adjusting to desired product structures and for improved economy of operations.

A selective hydrogenation process for C4 stream with high butadiene content

The invention relates to a selective hydrogenation process for a C4 material flow with high concentration of butadiene. The selective hydrogenation process comprises the following steps of: enabling the C4 material flow with the high concentration of butadiene to pass through one or more fixed bed hydrogenation reactors (I) with circulation pipelines, carrying out a selective hydrogenation reaction on the C4 mixture with high concentration of butadiene under the action of a catalyst to remove the butadiene and alkyne and generate butylene, enabling the reactor to pass through a terminal reactor (II) without the circulation pipeline, and further removing the residual butadiene and alkyne from the C4 material flow with the low concentration of butadiene. By utilizing the selective hydrogenation process and the catalyst provided by the invention, the controlled concentration range of the butadiene and the C4 alkyne of the C4 material flow is 5-80wt%, the concentrations of the butadiene and the alkyne of the hydrogenated C4 material flow can be respectively reduced to below 10ppm, the selectivity of the 1-butene generation by the butadiene can be more than 50%, and the butadiene can be taken as the raw material of preparing the 1-butene. According to the selective hydrogenation process disclosed by the invention, the C4 material flow is reasonably utilized.

Composite process for treatment of inferior residual oil

ActiveCN101418222AWide adaptability of raw materialsAchieve maximum light weightTreatment with hydrotreatment processesTar working-up by solvent extractionDistillationHydrogenation process
The invention discloses a combined process method for treating inferior residual oil. The method comprises the following steps: a residual oil material enters a solvent deasphalting device to obtain DAO and deoil asphalt; the obtained DAO enters a hydrogenation device of a boiling bed and is treated to obtained a lightweight distillation fraction and hydrogenated tail oil; the hydrogenated tail oil enters a catalytic cracking device and is treated to obtain a lightweight distillation fraction and oil slurry; at least partial oil slurry and the deoil asphalt are mixed, enter a hydrogenation device of a suspension bed and are treated to obtain a lightweight distillation fraction and unconverted tail oil, wherein the unconverted tail oil circularly returns the solvent deasphalting device; and the lightweight distillation fraction and the DAO are mixed and enter the hydrogenation device of the boiling bed. The combined process course organically combines a decarbonization process and a hydrogenation process; and according to different properties of raw materials, a corresponding process and operation condition is adopted so as to maximize conversion of the residual oil material while minimizing equipment investment.

Preparation method for C9 hydrogenation petroleum resin

The invention relates to a preparation method for C9 hydrogenation petroleum resin. The C9 hydrogenation petroleum resin is dissolved in organic solvent, and the concentration of the C9 hydrogenation petroleum resin is 5wt %-30wt%. The C9 hydrogenation petroleum resin is filtered to remove undissolved substances, then subjected to a first section of hydrodesulfurization process and a second section of hydrogenation decoloration process, and finally subjected to the process of decompression rectification and solvent recovery to obtain C9 hydrogenation petroleum resin products. The preparation method adopts two-section hydrogenation, improves reaction activity, selectivity and impurity resistant capability, is wide in adaptability of C9 petroleum resin raw materials, and obtains C9 petroleum resin through adoption of thermal polymerization or catalytic polymerization. No matter impurity content in resin solution is high or low, particularly, when sulphur content is high in the resin solution, the two-step hydrogenation process can be carried out through the preparation method, and the C9 hydrogenation petroleum resin with high performance is obtained. Through the first section of hydrodesulfurization, hydrogenation noble metal catalyst in the second section is effectively protected. Service life of catalyst is greatly prolonged. Reaction pressure of the two-section hydrogenation is quite low, and industrial production cost is little.

Hydrofining catalyst and preparation method thereof

The invention discloses a hydrofining catalyst and a preparation method thereof, belonging to the field of catalysts used in the petroleum-chemical industry. The hydrofining catalyst disclosed herein comprises a carrier, an active component and an auxiliary agent, wherein the carrier is Ti-modified gamma-alumina, the active component comprises oxides of Mo, Co and Ni, and the auxiliary agent comprises oxides of rare earth. The catalyst is characterized in that: based on 100% of the total weight of the catalyst, Co (measured in CaO) in the active component accounts for 2.0-7.5% of the total weight of the catalyst, Mo (measured in MoO3) in the active component accounts for 4.0-18.0% of the total weight of the catalyst, Ni (measured in NiO) in the active component accounts for 0.2-5.0% of the total weight of the catalyst, the auxiliary agent accounts for 0.05-1.0% of the total weight of the catalyst, and the balance consists of the carrier. According to the invention, the catalyst prepared by the formula and the method disclosed in the invention can carry out hydrogenation on saturated monoolefine while the catalyst is used for carrying out hydrodesulfurization on oils, can be suitable for technical requirements of heavy oriention, changeable sulphur content, and high air speed of hydrogenation liquid for pyrolysis gasoline two-stage hydrogenated raw materials, and simultaneously, the catalyst has the advantages of low activation temperature and low loss of aromatics in the hydrogenation process.

Novel process for preparing xylitol

The invention relates to a novel process for preparing xylitol, which belongs to the technical field of functional sugar alcohol production. Pre-treatment, hydrolysis, neutralization, decoloring, ion exchange, evaporation and concentration and chromatography are carried out to corncob or bagasse and other agricultural waste which contains hemicellulose, high-content xylose solution is collected and distillated, and then continuously hydrogenated, so that the xylose solution is converted into xylitol solution, and finally a xylitol crystal is obtained through refining, concentration, crystallization, centrifugation and drying; the process comprises: corncob-> pre-treatment->hydrolysis->neutralization and decoloring->ion exchange->evaporation and concentration->chromatography->high-content xylose solution collection and distillation-> hydrogenatio->refining->concentration->crystallization->centrifugation->drying->finished crystal xylitol product obtaining. The novel process for preparing xylitol saves a xylose crystallization procedure and a conversion process xylose crystal into sugar, shortens a production procedure, adopts a chromatography technology to improve the content of thexylose solution, facilitates the obtaining of high-content xylitol solution after hydrogenation can prepare the high-grade xylitol product, adopts a continuous hydrogenation process, improves the hydrogenation efficiency, reduces the labor intensity of a worker, and saves the production cost.

Supported ruthenium catalyst and preparation method thereof

The invention discloses a supported ruthenium catalyst and a preparation method thereof. The preparation method is characterized in that the preparation method comprises the following steps: 1, preprocessing a carrier with a soluble alkaline earth metal salt, wherein the mass of the soluble alkaline earth metal salt accounts for 0.1-20% of the mass of the carrier; and 2, dipping the alkaline earth metal salt processed carrier with a material which comprises a primary active component metallic ruthenium and an assisted catalytic component comprising one or several of Ni, Co, Pd and Pt, wherein the mass of the primary component metallic ruthenium accounts for 0.1-5% of the carrier, and the mass of the secondary component comprising one or several of Ni, Co, Pd and Pt accounts for 0.01-5% of the mass of the carrier. The catalyst of the invention is mainly applied to the selective hydrogenation process of an aromatic ring of an aromatic compound, wherein the aromatic ring of the aromatic compound has at least one alkyl group, one ester group, one hydroxyl group or an amino group and also has at least one C1-8 alkyl group. Compared with catalysts prepared with the prior art, the catalyst of the invention has the advantages of low cost, simple preparation method, high activity, good selectivity, high safety in the operation of the aromatic ring hydrogenation, realization of the operation of the aromatic ring hydrogenation under a low pressure, and good economy.

Method for preparing o-phenylenediamine by catalytic hydrogenation of o-nitrophenylamine

The invention discloses a method for preparing o-phenylenediamine by catalytic hydrogenation of o-nitrophenylamine. The method is characterized in that: in the hydrogenation reaction of o-nitrophenylamine, alcohol is used as a solvent, nickel is used as a catalyst, reduction reaction is performed for 2 to 10 hours under the hydrogen pressure of 1.0 to 6 MPa at the temperature of between 40 and 80 DEG C, and the reaction product is rectified to form the while o-phenylenediamine. The method has the advantages that the alcohol is used as the solvent in the catalytic hydrogenation for producing o-phenylenediamine, the alcohol can be reclaimed and directly used for next reaction, and the waste residue produced by distillation can be used as an organic fuel, so that the problem that a large amount of waste water containing organic substances is produced in reduction of iron powder or sodium sulfide in the conventional process is solved; and thick acid and thick alkali used in the conventional process are avoided in the hydrogenation process, so that corrosion of equipment is greatly reduced, pollution is reduced, and almost zero pollution is realized. In addition, compared with the conventional iron powder or sodium sulfide reduction, the catalytic hydrogenation process has the advantages of low pollution, high yield, high quality, short production period and low energy consumption.
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